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As an extra option, maybe Apple should add a mini Cover Flow to Dock. It will be just like Cover Flow but smaller and dock size. It will behave like the dock and you could give applications to it and remove applications as well resize the Cover Flow dock.

You mean magnification in the dock?
 
I use QuickSilver, so all the apps in the dock are in use...thank god, because those blue dots seem useless...
 
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